Armchair Treasure Hunting - Dedicated to the work of all treasure hunt setters but most especially to the craft of Kit Williams and Dan James.
Masquerade and the Mysteries of Kit Williams - Dedicated to the picture book called Masquerade, written and illustrated by Kit Williams, that could be read as a standard child's but was designed as a real-world treasure hunt.
Quest4Treasure - Community created for armchair treasure hunters and puzzlers.
Tweleve.org - Dedicated to solving Michael Stadther's A Treasure's Trove.